The most sticky glue, and a method of distribution to cover a massive area in it, requires the Superior Adhesive Factory.
”
~ Official BMC description
The Superior Adhesive Factory allows research of the Glue Striker upgrade for purchase for the Glue Gunner. It costs $16,000 to build, takes 36 hours to construct, and gives 500 XP when built, and requires the Sticky Sap Plant tile to construct. It consumes 40 and a 1x1 tile space. It requires Level 20 to unlock.
Superior Adhesive Factory
The tile upon which the Superior Adhesive Factory must be placed (Sticky Sap Plant)